CN104393631A - Electric quantity balancing system and balancing method - Google Patents
Electric quantity balancing system and balancing method Download PDFInfo
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- CN104393631A CN104393631A CN201410558320.9A CN201410558320A CN104393631A CN 104393631 A CN104393631 A CN 104393631A CN 201410558320 A CN201410558320 A CN 201410558320A CN 104393631 A CN104393631 A CN 104393631A
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Abstract
The invention discloses an electric quantity balancing system and balancing method. The electric quantity balancing system comprises a battery pack, an acquisition module, a processing module, a switching module, and a balancing module. To be specific, the battery pack includes a plurality of single batteries that are connected in series. The acquisition module is connected with the battery pack and is used for collecting voltage values of all single batteries. The processing module connected with the acquisition module is used for obtaining the voltage values and generating a first control signal and a second control signal according to the voltage values. A control terminal of the switching module is connected with the processing module; and the switching module obtains the first control signal from the processing module and carries out connection or disconnection based on the first control signal. The balancing module respectively connected with the switching module, the processing module, and the battery pack is used for balancing the battery pack according to the second control signal of the processing module. On the basis of the technical scheme, the structure is simple; the balancing current is constant; and high-efficiency balancing can be realized.
Description
Technical field
The present invention relates to electric quantity balancing technical field, particularly relate to a kind of equalizing system of electricity and the method for equilibrium thereof.
Background technology
The battery pack active equalization technology of prior art, mainly through utilizing the energy storage device such as inductance or electric capacity in conjunction with switching over matrix, the electricity of cell energy can had more than needed is transferred on the cell of energy shortcoming, and then reaches the object of electric energy balance.
Wherein, the circuit of the battery pack active equalization technology of prior art is complicated, and device is many, cost is high, reliability is low, in the application of multi-string battery group when the low cell of energy and the high cell of energy far away time required time for balance longer, and constant current equilibrium can not be realized.
Summary of the invention
Embodiments provide a kind of equalizing system of electricity and the method for equilibrium thereof, structure is simple, and euqalizing current is constant, realizes high efficiency equilibrium.
The invention provides a kind of equalizing system of electricity, it comprises battery pack, and it comprises multiple cell, and multiple cell is connected in series; Acquisition module, is connected with battery pack, for gathering the magnitude of voltage of each cell; Processing module, is connected with acquisition module, obtains magnitude of voltage, and generates the first control signal and the second control signal according to magnitude of voltage; Switch module, its control end is connected with processing module, obtains the first control signal from processing module, and disconnects according to the first control signal or close; Balance module, is connected with switch module, processing module and battery pack respectively, carries out equilibrium for the second control signal according to processing module to battery pack.
Wherein, balance module is the two-way DC/DC module of isolation, the first end of isolating two-way DC/DC module is connected with the first cell of battery pack with the second end, 3rd end of isolating two-way DC/DC module is connected with other cells by switch module with the 4th end, the control end of isolating two-way DC/DC module is connected with processing module, to obtain the second control signal; Isolate two-way DC/DC module, according to the second control signal, equilibrium is carried out to the first cell and other cells.
Wherein, processing module obtains the cell of maximum voltage or the cell of minimum voltage, processing module controls the switch module corresponding with the cell of large voltage or the cell of minimum voltage and closes, and the cell of maximum voltage or the cell of minimum voltage are connected with the first cell by the two-way DC/DC module of isolation.
Wherein, processing module judges that meeting balanced entry condition comprises: the pressure value of the cell of minimum voltage is more than or equal to default balanced starting resistor threshold value; And the pressure value of the cell of maximum voltage and the difference of the pressure value of the cell of minimum voltage are more than or equal to and default balancedly start difference; And battery pack normally works.
Wherein, when the first cell is the cell of minimum voltage, the cell of maximum voltage is connected with the first cell by the two-way DC/DC module of isolation, processing module sends second and controls signal to the two-way DC/DC module of isolation, to make the electricity of the cell of maximum voltage transfer to the first cell by the two-way DC/DC module of isolation, until processing module judges not meet balanced entry condition, when the first cell is the cell of maximum voltage, the cell of minimum voltage is connected with the first cell by the two-way DC/DC module of isolation, processing module sends second and controls signal to the two-way DC/DC module of isolation, to make the electricity of the first cell transfer to the cell of minimum voltage by the two-way DC/DC module of isolation, until processing module judges not meet balanced entry condition, the magnitude of voltage of the cell of minimum voltage is greater than at the magnitude of voltage of the first cell, and the magnitude of voltage of the first cell is less than the magnitude of voltage of the cell of maximum voltage, during batteries charging, processing module sends second and controls signal to the two-way DC/DC module of isolation, the electricity of the cell of maximum voltage transfers to the first cell by the two-way DC/DC module of isolation, after the balanced time of presetting, the electricity of the first cell transfers to the cell of minimum voltage by the two-way DC/DC module of isolation, until processing module judges not meet balanced entry condition, the magnitude of voltage of the cell of minimum voltage is greater than at the magnitude of voltage of the first cell, and the magnitude of voltage of the first cell is less than the magnitude of voltage of the cell of maximum voltage, during battery power discharge, processing module sends second and controls signal to the two-way DC/DC module of isolation, the electricity of the first cell transfers to the cell of minimum voltage by the two-way DC/DC module of isolation, after the balanced time of presetting, the electricity of the cell of maximum voltage transfers to the first cell by the two-way DC/DC module of isolation, until processing module judges not meet balanced entry condition.
Wherein, equalizing system also comprises the first switch, and the first switch is connected to the first cell and isolates between two-way DC/DC module, and the control end of the first switch is connected with processing module, and processing module controls the first switch and disconnects or close.
The present invention also provides a kind of method of electric quantity balancing, and it comprises: the magnitude of voltage obtaining each battery cell of battery pack; The first control signal and the second control signal is generated according to magnitude of voltage; Disconnect according to the first control signal control switch module or close; According to the second control signal, equilibrium is carried out to battery pack.
Wherein, method also comprises: judge whether to meet the balanced condition started; Wherein, the balanced condition started comprises: the pressure value of the cell of minimum voltage is more than or equal to default balanced starting resistor threshold value; And the pressure value of the cell of maximum voltage and the difference of the pressure value of the cell of minimum voltage are more than or equal to and default balancedly start difference; And battery pack normally works; If so, then according to the second control signal, equilibrium is carried out to battery pack.
Wherein, carry out equilibrium according to the second control signal to battery pack to comprise: when the first cell of battery pack is the cell of minimum voltage, the cell of maximum voltage is connected with the first cell by the two-way DC/DC module of isolation, according to the second control signal, the electricity of the cell of maximum voltage is transferred to the first cell by the two-way DC/DC module of isolation, until judge not meet balanced entry condition; When the first cell is the cell of maximum voltage, the cell of minimum voltage is connected with the first cell by the two-way DC/DC module of isolation, according to the second control signal, the electricity of the first cell is transferred to the cell of minimum voltage by the two-way DC/DC module of isolation, until judge not meet balanced entry condition.
Wherein, carry out equilibrium according to the second control signal to battery pack to comprise: the magnitude of voltage being greater than the cell of minimum voltage at the magnitude of voltage of the first cell, and the magnitude of voltage of the first cell is less than the magnitude of voltage of the cell of maximum voltage, during batteries charging, according to the second control signal, the electricity of the cell of maximum voltage is transferred to the first cell by the two-way DC/DC module of isolation, after the balanced time of presetting, according to the second control signal, the electricity of the first cell is transferred to the cell of minimum voltage by the two-way DC/DC module of isolation, until judge not meet balanced entry condition, the magnitude of voltage of the cell of minimum voltage is greater than at the magnitude of voltage of the first cell, and the magnitude of voltage of the first cell is less than the magnitude of voltage of the cell of maximum voltage, during battery power discharge, according to the second control signal, the electricity of the first cell is transferred to the cell of minimum voltage by the two-way DC/DC module of isolation, after the balanced time of presetting, according to the second control signal, the electricity of the cell of maximum voltage is transferred to the first cell by the two-way DC/DC module of isolation, until judge not meet balanced entry condition.
By such scheme, the invention has the beneficial effects as follows: the present invention, by balance module, is connected with switch module, processing module and battery pack respectively, for the second control signal according to processing module, equilibrium is carried out to battery pack, structure is simple, and euqalizing current is constant, realizes high efficiency equilibrium.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Wherein:
Fig. 1 is the structural representation of the equalizing system of the electricity of first embodiment of the invention;
Fig. 2 is the flow chart of the method for the electric quantity balancing of first embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under performing creative labour prerequisite, belong to the scope of protection of the invention.
Shown in Figure 1, Fig. 1 is the structural representation of the equalizing system of the electricity of first embodiment of the invention.As shown in Figure 1, the equalizing system 1 of electricity that the present embodiment discloses comprises battery pack 10, acquisition module 11, processing module 12, switch module 13 and balance module 14.
Wherein, battery pack 10 comprises multiple cell 101, and multiple cell 101 is connected in series, and cell 101 can be lithium-ions battery, lithium polymer battery, lead accumulator, the battery such as nickel-cadmium cell, Ni-MH battery.
Wherein, acquisition module 11 is connected with battery pack 10, and for gathering the magnitude of voltage of each cell 101, acquisition module 11 can also gather the state of each cell 101, the states such as the electric current of such as cell 101 or the temperature of cell 101.Processing module 12 is connected with acquisition module 11, for obtaining the magnitude of voltage of each cell 101 from acquisition module 11, processing module 12 is preferably embedded processing module, such as embedded processing module is MCU (Micro Controller Unit, micro-control unit) processor or ARM (Advanced RISCMachine, Advanced Reduced Instruction Set machine) processor.
Switch module 13 is connected between battery pack 10 and balance module 14, and the control end 131 of switch module 13 is connected with processing module 12, to obtain the first control signal from processing module 12; Switch module 13 carries out disconnecting or closing according to the first control signal.Preferably, switch module 13 is cell 101 gating switch array.
Balance module 14 is also connected with the first cell 102 of battery pack 10, for the electricity between balanced cell 101.The control end 145 of balance module 14 is connected with processing module 12, and to obtain the second control signal from processing module 12, the second control signal is preferably balanced control signal.
Alternatively, equalizing system 1 also comprises the first K switch 1, first K switch 1 and is connected between the first cell 102 and balance module 14, and the control end of the first K switch 1 is connected with processing module 12.Particularly, one end of the first K switch 1 and the positive pole of the first cell 102, the other end is connected with balance module 14, and processing module 12 controls the disconnection or closed of the first K switch 1.
Specifically, balance module 14 preferably isolates two-way DC/DC module, the first end 141 of isolating two-way DC/DC module 14 is connected with the first cell 102 of battery pack 10 with the second end 142,3rd end 143 of isolating two-way DC/DC module 14 is connected with other cells of battery pack 10 by switch module 13 with the 4th end 144, the control end 145 of isolating two-way DC/DC module 14 is connected with processing module 12, to obtain the second control signal.
Processing module 12 obtains the cell of maximum voltage or the cell of minimum voltage by acquisition module 11, and judges whether satisfied balanced entry condition.Wherein, meet balanced entry condition to comprise: the pressure value of the cell of minimum voltage is more than or equal to default balanced starting resistor threshold value; And the pressure value of the cell of maximum voltage and the difference of the pressure value of the cell of minimum voltage are more than or equal to and default balancedly start difference; And battery pack 10 normally works, i.e. the normal discharge and recharge of battery pack 10.If processing module 12 judges not meet balanced entry condition, then stop equilibrium.
If processing module 12 judges to meet balanced entry condition, the switch module 13 that then processing module 12 control is corresponding with the cell of maximum voltage or the cell of minimum voltage closes, namely the cell of maximum voltage or the cell of minimum voltage are connected with the 3rd end 143 and the 4th end 144 of isolating two-way DC/DC module 14 by switch module 13, and the cell of maximum voltage or the cell of minimum voltage are connected with the first cell 102 by the two-way DC/DC module 14 of isolation.
When the processing module 12 control switch module 13 corresponding with the cell of maximum voltage or the cell of minimum voltage closes, processing module 12 also controls the first K switch 1 and closes, and the first cell 102 is connected with the first end 141 and the second end 142 of isolating two-way DC/DC module 14.
When the first cell 102 is the cell of minimum voltage, the cell of maximum voltage is connected with the first cell 102 by the two-way DC/DC module 14 of isolation, processing module 12 sends second and controls signal to the two-way DC/DC module 14 of isolation, the first cell 102 is transferred to by the two-way DC/DC module 14 of isolation to make the electricity of the cell of maximum voltage, until processing module 12 judges not meet balanced entry condition, then stop equilibrium, namely processing module 12 sends the second control signal to the two-way DC/DC module 14 of isolation, electricity is stopped to shift to control the two-way DC/DC module 14 of isolation, then processing module 12 controls the first K switch 1 and switch module 13 all disconnects.
When the first cell 102 is the cell of maximum voltage, the cell of minimum voltage is connected with the first cell 102 by the two-way DC/DC module 14 of isolation, processing module 12 sends second and controls signal to the two-way DC/DC module 14 of isolation, the cell of minimum voltage is transferred to by the two-way DC/DC module 14 of isolation to make the electricity of the first cell 104, until processing module 12 judges not meet balanced entry condition, then stop equilibrium.
The magnitude of voltage of the cell of minimum voltage is greater than at the magnitude of voltage of the first cell 102, and the magnitude of voltage of the first cell 102 is less than the magnitude of voltage of the cell of maximum voltage, when battery pack 10 is charged, processing module 12 sends second and controls signal to the two-way DC/DC module 14 of isolation, the electricity of the cell of maximum voltage transfers to the first cell 102 by the two-way DC/DC module 14 of isolation, after the balanced time of presetting, the electricity of the first cell 102 transfers to the cell of minimum voltage by the two-way DC/DC module 14 of isolation, until processing module 12 judges not meet balanced entry condition, then stop equilibrium.
The magnitude of voltage of the cell of minimum voltage is greater than at the magnitude of voltage of the first cell 102, and the magnitude of voltage of the first cell 102 is less than the magnitude of voltage of the cell of maximum voltage, when battery pack 10 is discharged, processing module 12 sends second and controls signal to the two-way DC/DC module 14 of isolation, the electricity of the first cell 102 transfers to the cell of minimum voltage by the two-way DC/DC module 14 of isolation, after the balanced time of presetting, the electricity of the cell of maximum voltage transfers to the first cell 102 by the two-way DC/DC module 14 of isolation, until processing module 12 judges not meet balanced entry condition, then stop equilibrium.
In other embodiments, those of ordinary skill in the art can utilize the battery cell of maximum SOC to replace the cell of maximum voltage completely, and the battery cell of minimum SOC replaces the cell of minimum voltage, to realize electric quantity balancing.
The present embodiment is by arranging balance module 14, be connected with switch module 13, processing module 12 and battery pack 10 respectively, carry out equilibrium for the second control signal according to processing module 12 to battery pack 10, structure is simple, euqalizing current is constant, realizes high efficiency equilibrium; In addition, using cell as balanced unit, can realize the cell that cell that electricity directly has more than needed from electricity transfers to electricity shortcoming, balancing speed is faster and avoid euqalizing current adaptation; In addition, reliability is higher, and reduce the design difficulty of isolating two-way DC/DC module 14, volume is less, and cost is lower.
The present invention also provides a kind of method of electric quantity balancing, and the basis of the equalizing system 1 of its electricity disclosed in the first embodiment is described.As shown in Figure 2, the method that the present embodiment discloses comprises:
S201: the magnitude of voltage obtaining each battery cell of battery pack 10; a
S202: generate the first control signal and the second control signal according to magnitude of voltage;
S203: disconnect according to the first control signal control switch module 13 or close;
S204: equilibrium is carried out to battery pack 10 according to the second control signal.
In S201, by obtaining the magnitude of voltage of each battery cell of battery pack 10, with the cell of the cell or minimum voltage that obtain maximum voltage.
Before S203, judge whether to meet the balanced condition started, wherein the balanced condition started comprises: the pressure value of the cell of minimum voltage is more than or equal to default balanced starting resistor threshold value; And the pressure value of the cell of maximum voltage and the difference of the pressure value of the cell of minimum voltage are more than or equal to and default balancedly start difference; And battery pack 10 normally works; If so, then control the switch module 13 corresponding with the cell of maximum voltage or the cell of minimum voltage according to the first control signal to close, and according to the second control signal, equilibrium is carried out to battery pack 10.
In S204, when the first cell 102 of battery pack 10 is the cell of minimum voltage, the cell of maximum voltage is connected with the first cell 102 by the two-way DC/DC module 14 of isolation, according to the second control signal, the electricity of the cell of maximum voltage is transferred to the first cell by the two-way DC/DC module 14 of isolation, until judge not meet balanced entry condition, stop balanced;
When the first cell 102 is the cell of maximum voltage, the cell of minimum voltage is connected with the first cell 102 by the two-way DC/DC module 14 of isolation, according to the second control signal, the electricity of the first cell 102 is transferred to the cell of minimum voltage by the two-way DC/DC module 14 of isolation, until judge not meet balanced entry condition, stop balanced;
The magnitude of voltage of the cell of minimum voltage is greater than at the magnitude of voltage of the first cell 102, and the magnitude of voltage of the first cell 102 is less than the magnitude of voltage of the cell of maximum voltage, when battery pack 10 is charged, according to the second control signal, the electricity of the cell of maximum voltage is transferred to the first cell 102 by the two-way DC/DC module 14 of isolation, after the balanced time of presetting, according to the second control signal, the electricity of the first cell 102 is transferred to the cell of minimum voltage by the two-way DC/DC module 14 of isolation, until judge not meet balanced entry condition, stop balanced,
The magnitude of voltage of the cell of minimum voltage is greater than at the magnitude of voltage of the first cell 102, and the magnitude of voltage of the first cell 102 is less than the magnitude of voltage of the cell of maximum voltage, when battery pack 10 is discharged, according to the second control signal, the electricity of the first cell 102 is transferred to the cell of minimum voltage by the two-way DC/DC module 14 of isolation, after the balanced time of presetting, according to the second control signal, the electricity of the cell of maximum voltage is transferred to the first cell 102 by the two-way DC/DC module 14 of isolation, until judge not meet balanced entry condition, stop balanced.
In sum, the present invention, by arranging balance module, is connected with switch module, processing module and battery pack respectively, carries out equilibrium for the second control signal according to processing module to battery pack, and structure is simple, and euqalizing current is constant, realizes high efficiency equilibrium.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. an equalizing system for electricity, is characterized in that, described equalizing system comprises:
Battery pack, it comprises multiple cell, and described multiple cell is connected in series;
Acquisition module, is connected with described battery pack, for gathering the magnitude of voltage of each described cell;
Processing module, is connected with described acquisition module, obtains described magnitude of voltage, and generates the first control signal and the second control signal according to described magnitude of voltage;
Switch module, its control end is connected with described processing module, obtains described first control signal from described processing module, and disconnects according to described first control signal or close;
Balance module, is connected with described switch module, processing module and battery pack respectively, carries out equilibrium for the second control signal according to described processing module to described battery pack.
2. equalizing system according to claim 1, it is characterized in that, described balance module is the two-way DC/DC module of isolation, the first end of described isolation two-way DC/DC module is connected with the first cell of described battery pack with the second end, 3rd end of described isolation two-way DC/DC module is connected with cell described in other by described switch module with the 4th end, the control end of described isolation two-way DC/DC module is connected with described processing module, to obtain described second control signal; Described isolation two-way DC/DC module carries out equilibrium according to described second control signal to described first cell and other cells described.
3. equalizing system according to claim 2, it is characterized in that, described processing module obtains the cell of maximum voltage or the cell of minimum voltage, described processing module controls the described switch module corresponding with the cell of described large voltage or the cell of minimum voltage and closes, and the cell of described maximum voltage or the cell of minimum voltage are connected with described first cell by described isolation two-way DC/DC module.
4. equalizing system according to claim 3, is characterized in that, described processing module judges that meeting balanced entry condition comprises:
The pressure value of the cell of described minimum voltage is more than or equal to default balanced starting resistor threshold value;
And the pressure value of the cell of described maximum voltage and the difference of the pressure value of the cell of described minimum voltage are more than or equal to and default balancedly start difference;
And described battery pack normally works.
5. equalizing system according to claim 3, it is characterized in that, when described first cell is the cell of described minimum voltage, the cell of described maximum voltage is connected with described first cell by described isolation two-way DC/DC module, described processing module sends second and controls signal to the two-way DC/DC module of described isolation, to make the electricity of the cell of described maximum voltage transfer to described first cell by described isolation two-way DC/DC module, until described processing module judges not meet balanced entry condition;
When described first cell is the cell of described maximum voltage, the cell of described minimum voltage is connected with described first cell by described isolation two-way DC/DC module, described processing module sends second and controls signal to the two-way DC/DC module of described isolation, to make the electricity of described first cell transfer to the cell of described minimum voltage by described isolation two-way DC/DC module, until described processing module judges not meet balanced entry condition;
The magnitude of voltage of the cell of described minimum voltage is greater than in described first monomer battery voltage value, and described first monomer battery voltage value is less than the magnitude of voltage of the cell of described maximum voltage, during described batteries charging, described processing module sends second and controls signal to the two-way DC/DC module of described isolation, the electricity of the cell of described maximum voltage transfers to described first cell by described isolation two-way DC/DC module, after the balanced time of presetting, the electricity of described first cell transfers to the cell of described minimum voltage by described isolation two-way DC/DC module, until described processing module judges not meet balanced entry condition,
The magnitude of voltage of the cell of described minimum voltage is greater than in described first monomer battery voltage value, and described first monomer battery voltage value is less than the magnitude of voltage of the cell of described maximum voltage, during described battery power discharge, described processing module sends second and controls signal to the two-way DC/DC module of described isolation, the electricity of described first cell transfers to the cell of described minimum voltage by described isolation two-way DC/DC module, after the balanced time of presetting, the electricity of the cell of described maximum voltage transfers to described first cell by described isolation two-way DC/DC module, until described processing module judges not meet balanced entry condition.
6. equalizing system according to claim 3, it is characterized in that, described equalizing system also comprises the first switch, described first switch is connected between described first cell and the two-way DC/DC module of described isolation, the control end of described first switch is connected with described processing module, and described processing module controls described first switch and disconnects or close.
7. a method for electric quantity balancing, is characterized in that, described method comprises:
Obtain the magnitude of voltage of each battery cell of battery pack;
The first control signal and the second control signal is generated according to described magnitude of voltage;
Disconnect according to described first control signal control switch module or close;
According to described second control signal, equilibrium is carried out to described battery pack.
8. method according to claim 7, is characterized in that, described method also comprises:
Judge whether to meet the balanced condition started;
Wherein, the condition that described equilibrium starts comprises:
The pressure value of the cell of described minimum voltage is more than or equal to default balanced starting resistor threshold value;
And the pressure value of the cell of described maximum voltage and the difference of the pressure value of the cell of described minimum voltage are more than or equal to and default balancedly start difference;
And described battery pack normally works;
If so, then according to described second control signal, equilibrium is carried out to described battery pack.
9. method according to claim 8, is characterized in that, describedly carries out equilibrium according to described second control signal to described battery pack and comprises:
When the first cell of described battery pack is the cell of minimum voltage, the cell of maximum voltage is connected with described first cell by the two-way DC/DC module of isolation, according to described second control signal, the electricity of the cell of described maximum voltage is transferred to described first cell by described isolation two-way DC/DC module, until judge not meet balanced entry condition;
When described first cell is the cell of described maximum voltage, the cell of described minimum voltage is connected with described first cell by described isolation two-way DC/DC module, according to described second control signal, the electricity of described first cell is transferred to the cell of described minimum voltage by described isolation two-way DC/DC module, until judge not meet balanced entry condition.
10. method according to claim 8, is characterized in that, describedly carries out equilibrium according to described second control signal to described battery pack and comprises:
The magnitude of voltage of the cell of described minimum voltage is greater than in described first monomer battery voltage value, and described first monomer battery voltage value is less than the magnitude of voltage of the cell of described maximum voltage, during described batteries charging, according to described second control signal, the electricity of the cell of described maximum voltage is transferred to described first cell by described isolation two-way DC/DC module, after the balanced time of presetting, according to described second control signal, the electricity of described first cell is transferred to the cell of described minimum voltage by described isolation two-way DC/DC module, until judge not meet balanced entry condition,
The magnitude of voltage of the cell of described minimum voltage is greater than in described first monomer battery voltage value, and described first monomer battery voltage value is less than the magnitude of voltage of the cell of described maximum voltage, during described battery power discharge, according to described second control signal, the electricity of described first cell is transferred to the cell of described minimum voltage by described isolation two-way DC/DC module, after the balanced time of presetting, according to described second control signal, the electricity of the cell of described maximum voltage is transferred to described first cell by described isolation two-way DC/DC module, until judge not meet balanced entry condition.
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| CN106671813A (en) * | 2016-12-29 | 2017-05-17 | 东莞钜威动力技术有限公司 | Battery balancing method and battery management system |
| CN107706967A (en) * | 2017-06-19 | 2018-02-16 | 广州汇安科技有限公司 | The electric quantity equalizing system and its control method of a kind of portable power source device |
| CN107706967B (en) * | 2017-06-19 | 2018-12-18 | 广州汇安科技有限公司 | A kind of electric quantity equalizing system and its control method of portable power source device |
| CN107994278A (en) * | 2017-11-13 | 2018-05-04 | 深圳市道通智能航空技术有限公司 | A kind of battery balanced device, method and unmanned plane |
| CN107994278B (en) * | 2017-11-13 | 2024-04-09 | 深圳市道通智能航空技术股份有限公司 | Battery equalization device and method and unmanned aerial vehicle |
| CN108199445A (en) * | 2018-02-05 | 2018-06-22 | 江门市敏华电器有限公司 | The active equalization circuit and method of a kind of series-connected batteries |
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| CN104393631B (en) | 2017-07-07 |
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